Start from

It may be useful to multiply the whole expression by 2, in order to get rid of denominators:

Distribute the negative sign in the left hand side:

Move all terms involving x to the left, and all constants to the right:

Sum like terms:

DIvide both sides -5:

If you're talking about just the decimal, then yes it is.
If you're talking about 22/7, then it still is.
But if you're talking about pi, then it isn't rational.
Answer: 520
Explanation: The 4 is not bigger than 5
Domain: (-∞,∞)
Range: (3,∞)
x-intercepts: none
y-intercepts: (0,7)
Interval positive: (3,∞)
Interval negative: none
Interval increasing: (7,∞)
Interval decreasing: (-∞,7)
I'm not sure what the average rate of change over is though.
200 miles
You just multiply 50 by 4.
:) have a good day !